A primary settling tank at a wastewater treatment plant has one influent flow (Qin) and two effluent flows (Qout and Qw) as indicated in the schematic below. The tank has an influent concentration (cin) of 220 mg/L of suspended solids, an effluent concentration (cout) of 45 mg/L of suspended solids, and a waste concentration (cw) of 10,000 mg/L of suspended solids. If the influent flow rate is 450 m3/hr, what is the waste flow rate
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